Here is a collection of useful wikis and blogs that have been put together that have many many links to Web 2.0 tools.
Use the side bars to find an area you are looking for

Setting up Google Drive - Jacqui Sharpe
http://mathsandelearning.wikispaces.com/Google+Docs

Web 2.0 tools for the classroom

Cool Tools for Schools
This site has been compiled by Lenva Shearing

VoiceThread
Encourage oral language
Record student thinking - explain their thinking further

Reflections on their writing, talk about their learning
Other students can provide feedback on a piece of work
Students read a piece of text - check expression, fluency, running records - teacher can play back later
Upload photos - eg a writing sample